Aaron Lehmann e2a7ae61b2 cluster: Allow reentrant calls to methods during shutdown ...

The agent sometimes calls into libnetwork code that in turn calls
(*Cluster).IsAgent and (*Cluster).IsManager. These can cause the
node shutdown process to time out, since they wait for a lock that is
held by Cleanup.

It turns out c.mu doesn't need to be held while calling Stop. Holding
controlMutex is sufficient. Also, (*nodeRunner).Stop must release
nodeRunner's mu during the node shutdown process, otherwise the same
call into Cluster would be blocked on this lock instead.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
Upstream-commit: 44ce809c954eec6755ba975ab7fe1c11ebbdfed2
Component: engine

2017-04-07 19:21:10 -07:00

components/engine

cluster: Allow reentrant calls to methods during shutdown

2017-04-07 19:21:10 -07:00

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